.dialog-masker{
    position: fixed;
    background: rgba(0,0,0,0.7);
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 9999;
}
.dialog-wrap{
    width: 600px;
    height: 300px;
    border-radius: 10px;
    background: #fff;
    position: absolute;
    left: 50%;
    top: 50%;
    padding: 20px;
    overflow: auto;
    transform: translate3d(-50%, -50%, 0);
}